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Pension and Post-Employment Benefits - Plan Net Pension Credit (Detail) - GERMANY - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ (0.9) $ (0.9) $ (1.7) $ (1.8)
Interest cost on projected benefit obligation (4.6) (5.0) (9.3) (9.9)
Expected return on plan assets 6.4 6.3 12.8 12.5
Amortization of prior service cost (0.2) (0.1) (0.3) (0.2)
Amortization of actuarial net gains/(losses) 0.0 0.5 0.1 1.0
Net periodic benefit $ 0.7 $ 0.8 $ 1.6 $ 1.6